Audio Damage Dr. Device - Manual (Page 9)

 Two-pole high pass (shown as “2PHP”): If you've been paying attention you can probably figure this
one out for yourself, right? It's a high-pass filter that has a less steep attenuation curve than the four-
pole high-pass filter. Use it when you want to create a thinner sound without the drastic low-frequency
reduction of the four-pole high-pass filter.
 Four-pole band pass (shown as “4PBP”): A band-pass filter allows a range of frequencies centered on
the cutoff frequency to pass and attenuates higher and lower frequencies. The width of the band of
frequencies is controlled by the Resonance control. Wah-wah pedals used by guitarists are based on
band-pass filters.
The GAIN knob amplifies or attenuates the signal as it leaves the filter, changing its loudness. At its center 12
o'clock position it has unity gain, that is, it does not change the signal. Rotate the knob clockwise from this
position to make the signal louder, rotate it counter-clockwise to make the signal quieter.
The Soft Saturation (SOFTSAT) knob applies a variable amount of analog-like distortion to the signal before it
enters the filter. If the knob is rotated fully counter-clockwise it has no effect. As you rotate the knob
clockwise, the signal will become increasingly distorted.
The BITCRUSH knob applies a variable amount of digital distortion to the signal. If the knob is rotated fully
counter-clockwise it has no effect. The BITCRUSH effect works by resampling the signal with a lower sampling
rate, deliberately introducing digital artifacts and distortion. Rotate the knob clockwise to create an increasing
amount of digital destruction.
The ACTIVE buttons bypass or engage the filter, soft saturator, and bitcrusher. If the IN button is illuminated,
the filter and distortion effects are turned on. If the OUT button is illuminated, the filter and distortion effects
are bypassed altogether and have no effect on the signal passing through the plug-in. Click either button to
switch between IN and OUT.
2. Delay Controls
The knobs and buttons in the Delay section control Dr. Device's stereo delay effect. The delay receives its
input from the Filter section. If you're using Dr. Device in a mono context, the left and right channels of the
delay operate on the same input signal.